Sunderland have completed the signing of Lorient midfielder Didier Ndong for £13.6m.
The club-record move has seen Ndong sign a five-year contract with the Black Cats, who are hoping to further boost their squad before the summer transfer window slams shut at 11pm on Wednesday night.
Ndong, 22, is a Gabon international of 18 caps and departs Lorient having made 46 league appearances for the French outfit since January 2015.
"I am very proud and happy to sign for Sunderland. This is a new adventure for me and to play in the Premier League is a dream come true," Ndong told the club's official website.
"Maybe the Sunderland fans don't know me yet, but I promise that they will quickly discover that I will give everything for them and the club. It will be an honour to wear the Sunderland shirt and I will wear it with a true understanding of what it means.
"I am excited to meet everyone at the club, to see the stadium and of course the fans, who I have heard so many good things about. Today is the most beautiful day of my life."
Ndong has become Sunderland's seventh arrival in this summer's transfer window.